<!DOCTYPE html>
<html lang="zh-CN">

<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
</head>

<body>
  <script>
    const data = [
      { id: "01", name: "张大大", pid: "", job: "项目经理" },

      { id: "02", name: "小亮", pid: "01", job: "产品leader" },
      { id: "07", name: "小丽", pid: "02", job: "产品经理" },
      { id: "08", name: "大光", pid: "02", job: "产品经理" },


      { id: "03", name: "小美", pid: "01", job: "UIleader" },
      { id: "09", name: "小高", pid: "03", job: "UI设计师" },


      { id: "04", name: "老马", pid: "01", job: "技术leader" },
      { id: "05", name: "老王", pid: "01", job: "测试leader" },
      { id: "06", name: "老李", pid: "01", job: "运维leader" },
      { id: "10", name: "小刘", pid: "04", job: "前端工程师" },
      { id: "11", name: "小华", pid: "04", job: "后端工程师" },
      { id: "12", name: "小李", pid: "04", job: "后端工程师" },
      { id: "13", name: "小赵", pid: "05", job: "测试工程师" },
      { id: "14", name: "小强", pid: "05", job: "测试工程师" },
      { id: "15", name: "小涛", pid: "06", job: "运维工程师" }
    ]


    function arrToTree (list){
      const treeData = []
      list.forEach(item => {
        const children = list.filter((data =>  data.pid === item.id ))
        if (children.length) {
          item.children = children
        }

        treeData.push(item)
      });
      return treeData
    }
    console.log(arrToTree(data));
    
  //   function arrToTree(list, rootValue) {
  //     const treeData = []

  //     list.forEach(item => {
  //       if (item.pid === rootValue) {
  //         const children = arrToTree(list, item.id)
          
  //         if (children.length) {
  //           item.children = children
  //         }

  //         treeData.push(item)
  //       }
  //     })
  //     return treeData
  //   }
  //  console.log(arrToTree(data, '')); 
  </script>
</body>

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